How to get the active/selected QRadioButton from QTableView

I want to get the active QRadioButton from the QTableView when clicking a button. But I don't know how to do it.

Let's say I have a csv file my_csv that contains

ANIMAL; AGE
DOG; 3
CAT; 5
COW; 5

This is my sample code:

import pandas as pd

from PySide2.QtCore import Qt
from PySide2.QtGui import QStandardItemModel, QStandardItem
from PySide2.QtWidgets import QApplication, QTableView, QRadioButton, QPushButton

my_button = QPushButton()
model = QStandardItemModel()
view = QTableView()
view.setModel(model)

df = pd.read_csv(my_csv, sep=';')
header = list(['']) + df.columns
model.setHorizontalHeaderLabels(header)

for index in df_interface.index:
    data = list()
    item = QStandardItem()
    data.append(item)
    items = [QStandardItem("{}".format(field)) for field in df.iloc[index]]
    [element.setTextAlignment(Qt.AlignVCenter | Qt.AlignHCenter) for element in items]
    data.extend(items)
    model.appendRow(data)
    view.setIndexWidget(self.model.index(index, 0), QRadioButton())

I assume by "active", you mean the currently checked radio-button (if any). If so, one way to solve this is to use a QButtonGroup, like this:

# create button group
radio_btns = QButtonGroup()

for index in df_interface.index:
    ...
    # add button to the button group
    button = QRadioButton()
    radio_btns.addButton(button, index)
    view.setIndexWidget(self.model.index(index, 0), button)

With that done, you can get the index of the checked button like this:

index = radio_btns.checkedId()

(But note that this will return -1 if there is currently no checked button).